[gnome-db] Default provider DSN string documentation error

["Richard Campbell" <richard campbell oarcorp com>]

The documentation on provider's specific information for the default
provider at
http://www.gnome-db.org/docs/libgda/installation-configuring.html#INSTALLATI
ON-PROVIDER states that the DSN string is of the form
"FILENAME=/directory/for/the/database".

According to the code in gda_default_provider_open_connection() the DSN
string should be of the form "URI=/directory/for/the/database".  This is
what works for libgda-0.8.192.

Richard Campbell